Experimental Review of Graphene

Figure 32

Magnetotransport measurements. (a) Graphene is etched into a 4-terminal Hall bar. Gold electrodes are used to perform electrical measurements. The width of the central wire is 0.2 μm. (b) Graphene is placed on a thin SiO₂ layer (285–300 nm), which is itself on a doped Si wafer. A gate voltage 𝑉_𝑔 allows the carrier density to be tuned. Figure from [40].

(a)

(b)